/* =====================================================================
   快盈3 · 共享样式表 /assets/site.css
   墨核底 + 深空蓝 + 电光紫 + 霓虹青 —— 玻璃层与实色层并置
   ===================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ink:#071026;            /* 墨核底 */
  --space:#0A1633;          /* 深空蓝 */
  --space-2:#101F4A;        /* 深空蓝浅阶 */
  --violet:#6C3BFF;         /* 电光紫 */
  --cyan:#22E0D6;           /* 霓虹青 */
  --orange:#FF7A2F;         /* 活力橙 */
  --glass:#F4F7FF;          /* 通透玻璃白 */
  --muted:#A9B6D4;          /* 次级文字灰蓝 */
  --line:#3D5AFE;           /* 辅助蓝 */
  --ok:#4ADE80;             /* 状态绿 */

  --line-soft:rgba(61,90,254,.34);
  --line-hard:rgba(61,90,254,.55);
  --cyan-soft:rgba(34,224,214,.42);
  --glass-bg:rgba(16,31,74,.62);

  --font-sans:"HarmonyOS Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;

  --gutter:1.5rem;
  --measure:68ch;
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:.2s;
  --header-h:56px;
  --radius:2px;
}

/* ---------- 2. Reset 与基础排版 ---------- */
*,*::before,*::after{box-sizing:border-box;}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  min-height:100vh;
  background:var(--space);
  color:var(--muted);
  font-family:var(--font-sans);
  font-size:17px;
  font-weight:400;
  line-height:1.85;
  letter-spacing:.01em;
  text-rendering:optimizeLegibility;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

h1,h2,h3,h4,h5,h6{margin:0 0 .6em;color:var(--glass);font-weight:700;line-height:1.2;}
h1{font-weight:900;line-height:1.05;letter-spacing:-.02em;}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{color:var(--cyan);text-decoration:none;transition:color var(--dur) var(--ease);}
a:hover{color:var(--glass);}
img,svg,video{max-width:100%;display:block;}
img{height:auto;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
main{display:block;}
hr{border:0;border-top:1px solid var(--line-soft);margin:2rem 0;}

::selection{background:var(--violet);color:#fff;}

/* 键盘焦点：霓虹青双线 */
:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:2px;
  box-shadow:0 0 0 4px rgba(34,224,214,.2);
  border-radius:var(--radius);
}

/* ---------- 3. 布局助手 ---------- */
.container{
  width:min(1240px,100% - (var(--gutter) * 2));
  margin-inline:auto;
}
.container--wide{width:min(1440px,100% - (var(--gutter) * 2));}
.container--narrow{width:min(820px,100% - (var(--gutter) * 2));margin-inline:auto;}

.section{padding:clamp(72px,10vw,140px) 0;}
.section--tight{padding:clamp(48px,6vw,88px) 0;}
.section--flush{padding-bottom:0;}

.grid{display:grid;gap:1.25rem;}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid--auto{grid-template-columns:repeat(auto-fill,minmax(230px,1fr));}
.grid--split{grid-template-columns:minmax(0,38fr) minmax(0,62fr);gap:clamp(2rem,5vw,5rem);}
.grid--split-wide{grid-template-columns:minmax(0,30fr) minmax(0,70fr);gap:clamp(2rem,5vw,5rem);}

/* ---------- 4. 排版组件 ---------- */
.display{
  margin:0;
  font-size:clamp(44px,7vw,88px);
  font-weight:900;
  line-height:1.05;
  letter-spacing:-.02em;
  color:var(--glass);
}
.headline{
  margin:0;
  font-size:clamp(28px,3.4vw,40px);
  font-weight:700;
  line-height:1.2;
  color:var(--glass);
}
.prose{
  max-width:var(--measure);
  font-size:17px;
  line-height:1.85;
  color:var(--muted);
}
.prose strong{color:var(--glass);font-weight:700;}
.prose a{border-bottom:1px solid var(--cyan-soft);}
.prose a:hover{border-bottom-color:var(--cyan);}

.annotation{
  margin:0;
  font-size:12px;
  font-weight:400;
  letter-spacing:.28em;
  line-height:1.6;
  color:var(--cyan);
  text-transform:uppercase;
}
.annotation--vertical{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  letter-spacing:.34em;
}

.panel__label{
  display:inline-block;
  margin:0 0 .9rem;
  font-size:12px;
  letter-spacing:.28em;
  color:var(--cyan);
  text-transform:uppercase;
}

.chapter{
  display:flex;
  align-items:flex-start;
  gap:clamp(1rem,2.4vw,2rem);
}
.chapter__num{
  flex:none;
  font-size:clamp(48px,6vw,76px);
  font-weight:800;
  font-variant-numeric:tabular-nums;
  line-height:1;
  letter-spacing:-.03em;
  color:rgba(169,182,212,.32);
  transition:color .24s var(--ease);
}
.chapter__num.is-visible{color:var(--violet);}
.chapter__title{
  margin:0;
  padding-top:.35em;
  font-size:clamp(22px,2.6vw,32px);
  font-weight:700;
  line-height:1.2;
  color:var(--glass);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding:.22rem .62rem;
  border:1px solid var(--cyan-soft);
  border-radius:999px;
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--cyan);
  white-space:nowrap;
}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  padding:.8rem 1.5rem;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  text-decoration:none;
  cursor:pointer;
  transition:background-color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),
             color var(--dur) var(--ease),
             transform var(--dur) var(--ease);
}
.btn--primary{background:var(--violet);color:#fff;}
.btn--primary:hover{background:#7d51ff;color:#fff;transform:translateX(3px);}
.btn--ghost{border-color:var(--cyan-soft);background:rgba(16,31,74,.5);color:var(--cyan);}
.btn--ghost:hover{border-color:var(--cyan);background:rgba(34,224,214,.1);color:var(--glass);transform:translateX(3px);}
.btn--accent{background:var(--orange);color:var(--ink);}
.btn--accent:hover{background:#ff8c4d;color:var(--ink);transform:translateX(3px);}
.btn--block{width:100%;justify-content:center;}

/* ---------- 6. 面板：玻璃层与实色层 ---------- */
.glass-panel{
  position:relative;
  padding:clamp(1.4rem,2.4vw,2rem);
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  background:linear-gradient(180deg,var(--glass-bg),rgba(10,22,51,.5));
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
}
.glass-panel::before,
.glass-panel::after{
  content:"";
  position:absolute;
  width:14px;
  height:14px;
  pointer-events:none;
}
.glass-panel::before{top:-1px;left:-1px;border-top:2px solid var(--cyan);border-left:2px solid var(--cyan);}
.glass-panel::after{bottom:-1px;right:-1px;border-bottom:2px solid var(--cyan);border-right:2px solid var(--cyan);}

.solid-panel{
  position:relative;
  padding:clamp(1.4rem,2.4vw,2rem);
  background:var(--space-2);
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
}
.solid-panel__value{
  margin:0;
  font-size:clamp(32px,4vw,52px);
  font-weight:800;
  font-variant-numeric:tabular-nums;
  line-height:1;
  color:var(--glass);
}
.solid-panel__value em{font-style:normal;color:var(--orange);}
.solid-panel__key{margin:.5rem 0 0;font-size:13px;letter-spacing:.18em;color:var(--muted);text-transform:uppercase;}

/* ---------- 7. 索引卡 ---------- */
.index-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(220px,1fr));
  gap:1px;
  background:var(--line-soft);
  border:1px solid var(--line-soft);
}
.index-card{
  display:block;
  padding:1.15rem 1.2rem 1.3rem;
  background:var(--space);
  text-decoration:none;
  transition:background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.index-card:hover{background:var(--space-2);transform:translateY(-3px);}
.index-card__num{
  display:block;
  font-size:12px;
  font-weight:800;
  font-variant-numeric:tabular-nums;
  letter-spacing:.18em;
  color:var(--violet);
}
.index-card:hover .index-card__num{color:var(--cyan);}
.index-card__title{
  margin:.45rem 0 .3rem;
  font-size:17px;
  font-weight:700;
  color:var(--glass);
}
.index-card__desc{
  margin:0;
  font-size:14px;
  line-height:1.7;
  color:var(--muted);
}

/* ---------- 8. 图片容器 ---------- */
.media-frame{
  --ratio:16 / 9;
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:var(--ratio);
  overflow:hidden;
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  background:linear-gradient(135deg,var(--space-2) 0%,var(--ink) 60%,rgba(108,59,255,.28) 100%);
}
.media-frame > img,
.media-frame > video,
.media-frame > svg{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame__caption{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:.7rem 1rem;
  background:linear-gradient(0deg,rgba(7,16,38,.9),rgba(7,16,38,0));
  font-size:12px;
  letter-spacing:.16em;
  color:var(--glass);
}
.media-frame--16x9{--ratio:16 / 9;}
.media-frame--4x3{--ratio:4 / 3;}
.media-frame--3x4{--ratio:3 / 4;}
.media-frame--1x1{--ratio:1 / 1;}
.media-frame--21x9{--ratio:21 / 9;}

/* ---------- 9. 面包屑 ---------- */
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5rem;
  font-size:12px;
  letter-spacing:.16em;
  color:rgba(169,182,212,.7);
}
.breadcrumbs a{color:var(--cyan);}
.breadcrumbs a:hover{color:var(--glass);}
.breadcrumbs__sep{color:var(--line);}

/* ---------- 10. 显现协议 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(8px);
  transition:opacity .24s var(--ease), transform .24s var(--ease), color .24s var(--ease);
}
[data-reveal].is-visible{opacity:1;transform:none;}
.chapter__num[data-reveal]{opacity:1;transform:none;}

/* ---------- 11. 跳过链接 ---------- */
.skip-link{
  position:fixed;
  top:0;
  left:50%;
  z-index:200;
  padding:.6rem 1.2rem;
  transform:translate(-50%,-140%);
  background:var(--cyan);
  color:var(--ink);
  font-size:14px;
  font-weight:700;
  letter-spacing:.06em;
  text-decoration:none;
  border-radius:0 0 var(--radius) var(--radius);
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus{transform:translate(-50%,0);color:var(--ink);}

/* =====================================================================
   12. 页头：紧凑命令栏
   ===================================================================== */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:rgba(10,22,51,.78);
  border-bottom:1px solid var(--line-hard);
  color:var(--glass);
  backdrop-filter:blur(16px) saturate(150%);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
}
.site-header__inner{
  width:min(1440px,100% - (var(--gutter) * 2));
  margin-inline:auto;
  min-height:var(--header-h);
  display:flex;
  align-items:center;
  gap:1.25rem;
}

/* 品牌标记 */
.brand{
  display:inline-flex;
  align-items:baseline;
  gap:.6rem;
  flex:none;
  padding:.4rem 0;
  color:var(--glass);
  text-decoration:none;
}
.brand__mark{
  position:relative;
  padding-left:.85rem;
  font-size:18px;
  font-weight:900;
  letter-spacing:.06em;
  color:var(--glass);
}
.brand__mark::before{
  content:"";
  position:absolute;
  left:0;
  top:.18em;
  width:6px;
  height:1.05em;
  background:linear-gradient(180deg,var(--violet),var(--cyan));
}
.brand__sub{
  font-size:11px;
  letter-spacing:.28em;
  color:var(--muted);
  white-space:nowrap;
}
.brand:hover .brand__sub{color:var(--cyan);}

/* 移动端切换按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:.5rem;
  margin-left:auto;
  padding:.4rem .7rem;
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  color:var(--glass);
  font-size:13px;
  letter-spacing:.14em;
  transition:border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan-soft);background:rgba(34,224,214,.08);}
.nav-toggle__bars{
  position:relative;
  width:16px;
  height:2px;
  background:var(--cyan);
  box-shadow:0 5px 0 0 var(--cyan), 0 -5px 0 0 var(--cyan);
}
.nav-toggle__label{white-space:nowrap;}
.nav-toggle[aria-expanded="true"]{border-color:var(--cyan);background:rgba(34,224,214,.14);}

/* 主导航 */
.primary-nav{
  display:flex;
  align-items:center;
  gap:1rem;
  margin-left:auto;
  min-width:0;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:.15rem;
}
.nav-item{flex:none;}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding:.36rem .58rem;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-size:13px;
  font-weight:500;
  line-height:1.4;
  color:var(--muted);
  text-decoration:none;
  white-space:nowrap;
  transition:color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),
             background-color var(--dur) var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:.58rem;
  right:.58rem;
  bottom:.18rem;
  height:1px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--dur) var(--ease);
}
.nav-link__index{
  font-size:11px;
  font-weight:800;
  font-variant-numeric:tabular-nums;
  letter-spacing:.06em;
  color:var(--line);
  transition:color var(--dur) var(--ease);
}
.nav-link__label{font-weight:500;}
.nav-link:hover{color:var(--glass);border-color:rgba(34,224,214,.34);}
.nav-link:hover .nav-link__index{color:var(--cyan);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link:active{transform:translateY(1px);}
.nav-link[aria-current="page"]{
  background:var(--cyan);
  border-color:var(--cyan);
  color:var(--ink);
}
.nav-link[aria-current="page"]::after{transform:scaleX(0);}
.nav-link[aria-current="page"] .nav-link__index,
.nav-link[aria-current="page"] .nav-link__label{color:var(--ink);}
.nav-link[aria-current="page"] .nav-link__index{opacity:.62;}

/* 状态提示位 */
.status-pip{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  flex:none;
  padding:.3rem .7rem;
  border:1px solid var(--cyan-soft);
  border-radius:999px;
  background:rgba(16,31,74,.66);
  color:var(--glass);
  font-size:12px;
  letter-spacing:.08em;
  white-space:nowrap;
  text-decoration:none;
  transition:border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.status-pip:hover{border-color:var(--cyan);background:rgba(34,224,214,.12);color:var(--glass);}
.status-pip__dot{
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--ok);
  box-shadow:0 0 0 3px rgba(74,222,128,.18);
}
.status-pip__text{font-variant-numeric:tabular-nums;}

/* 滚动进度 */
.header-rule{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:1px;
  overflow:hidden;
  background:var(--line-soft);
}
.header-rule__bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--violet),var(--cyan));
  transition:width .1s linear;
}

/* =====================================================================
   13. 页脚
   ===================================================================== */
.site-footer{
  margin-top:clamp(72px,10vw,140px);
  background:var(--ink);
  border-top:1px solid var(--line-hard);
  color:var(--muted);
}
.footer-inner{
  width:min(1240px,100% - (var(--gutter) * 2));
  margin-inline:auto;
  padding:clamp(48px,6vw,80px) 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,1fr) minmax(0,1.45fr);
}
.footer-col{
  min-width:0;
  padding:0 clamp(1.2rem,2.4vw,2.2rem);
}
.footer-col:first-child{padding-left:0;}
.footer-col:last-child{padding-right:0;}
.footer-col + .footer-col{border-left:1px solid var(--line-soft);}

.footer-brand{
  display:inline-block;
  font-size:20px;
  font-weight:900;
  letter-spacing:.06em;
  color:var(--glass);
  text-decoration:none;
}
.footer-brand:hover{color:var(--cyan);}
.footer-tagline{
  margin:.8rem 0 .9rem;
  max-width:30ch;
  font-size:14px;
  line-height:1.8;
  color:var(--muted);
}
.footer-badge{
  display:inline-block;
  margin:0;
  padding:.2rem .6rem;
  border:1px solid var(--line-soft);
  border-radius:999px;
  font-size:11px;
  letter-spacing:.22em;
  color:var(--cyan);
}

.footer-heading{
  margin:0 0 1rem;
  font-size:12px;
  font-weight:700;
  letter-spacing:.28em;
  color:var(--glass);
  text-transform:uppercase;
}
.footer-links{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:.55rem .9rem;
}
.footer-links a{
  display:inline-block;
  font-size:14px;
  color:var(--muted);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.footer-links a:hover{color:var(--cyan);border-bottom-color:var(--cyan);}
.footer-links--legal{
  grid-template-columns:1fr;
  margin-top:1rem;
  padding-top:1rem;
  border-top:1px solid var(--line-soft);
}
.footer-links--legal a{font-size:13px;letter-spacing:.08em;}

.footer-contact{display:grid;gap:.7rem;}
.footer-contact__row{
  display:grid;
  grid-template-columns:5.5em minmax(0,1fr);
  gap:.8rem;
  font-size:14px;
  line-height:1.7;
}
.footer-contact__label{
  font-size:12px;
  letter-spacing:.18em;
  color:rgba(169,182,212,.62);
}
.footer-contact__value{color:var(--glass);word-break:break-word;font-variant-numeric:tabular-nums;}
.footer-note{
  margin:1rem 0 0;
  font-size:12px;
  letter-spacing:.06em;
  color:rgba(169,182,212,.62);
}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  align-items:center;
  gap:.6rem 1.5rem;
  margin-top:clamp(36px,4vw,56px);
  padding:1.15rem 0 2rem;
  border-top:1px solid var(--line-soft);
  font-size:12px;
  letter-spacing:.14em;
  color:rgba(169,182,212,.68);
}
.footer-legal,.footer-meta{margin:0;}
.footer-meta{font-variant-numeric:tabular-nums;}

/* =====================================================================
   14. 响应式
   ===================================================================== */
@media (max-width:1080px){
  .brand__sub{display:none;}
  .nav-link{padding:.36rem .5rem;}
}

@media (max-width:1023px){
  :root{--gutter:1.15rem;}

  .site-header__inner{gap:1rem;}
  .nav-toggle{display:inline-flex;}

  .primary-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:flex;
    gap:.6rem;
    margin-left:0;
    padding:.85rem var(--gutter);
    overflow-x:auto;
    background:rgba(7,16,38,.97);
    border-bottom:1px solid var(--line-hard);
    box-shadow:0 24px 40px rgba(3,7,20,.5);
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translateY(-8px);
    transition:opacity var(--dur) var(--ease),
               transform var(--dur) var(--ease),
               visibility var(--dur) var(--ease);
    -webkit-overflow-scrolling:touch;
    scrollbar-width:thin;
  }
  .primary-nav[data-open]{
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transform:translateY(0);
  }
  .nav-list{flex:none;gap:.4rem;}
  .nav-link{
    padding:.42rem .7rem;
    border-color:var(--line-soft);
    background:rgba(16,31,74,.55);
    font-size:13px;
  }
  .nav-link::after{display:none;}
  .status-pip{flex:none;}
}

@media (max-width:980px){
  .grid--split,
  .grid--split-wide{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:2rem 0;}
  .footer-col{padding:0 1.4rem;}
  .footer-col--contact{grid-column:1 / -1;padding-left:0;padding-right:0;border-left:0;}
  .footer-col--nav{border-left:1px solid var(--line-soft);}
  .footer-col--brand{padding-left:0;}
  .footer-col--contact{padding-top:2rem;border-top:1px solid var(--line-soft);}
}

@media (max-width:720px){
  body{font-size:16px;}
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr);}
  .index-grid{grid-template-columns:repeat(auto-fill,minmax(180px,1fr));}
  .chapter{flex-direction:column;gap:.5rem;}
  .chapter__num{font-size:44px;}
  .chapter__title{padding-top:0;}
}

@media (max-width:560px){
  :root{--gutter:1rem;}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .footer-col{padding:1.4rem 0 0;border-left:0;border-top:1px solid var(--line-soft);}
  .footer-col--brand{padding-top:0;border-top:0;}
  .footer-col--nav{border-left:0;}
  .footer-col--contact{border-left:0;}
  .footer-links{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-contact__row{grid-template-columns:1fr;gap:.15rem;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* =====================================================================
   15. 降低动效
   ===================================================================== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1 !important;transform:none !important;}
  .chapter__num{color:var(--violet) !important;}
  .index-card:hover,
  .btn:hover{transform:none !important;}
}